小密度处耦合常数对原子核基态性质的影响  

Influence of Small Density Coupling Constants on the Ground State Properties of Nuclear

作　　者：刘倩[1] 刘玲[1] 吴春颖[1] 

机构地区：[1]沈阳师范大学物理科学与技术学院,辽宁沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2010年第2期176-180,共5页Journal of Shenyang Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(10547127;10647139);沈阳师范大学博士启动基金资助项目(054-554401-01-013)

摘　　要：在考虑重排列项的基础上,采用密度依赖的相对论平均场理论,利用得到的在RMF下的2组有效相互作用,即密度相关的介子-核子耦合常数,详细的计算了Ca,Ni,Pb,Sn,Zr,O双幻核的基态性质,所得到的理论结果可以较好的符合实验上每粒子结合能及电荷均方根半径。由于小密度处耦合常数值是利用拟合的曲线外推得到的,考虑到小密度处耦合强度的重要性,重新构建一组耦合常数,并采用这组耦合常数计算Ca,Ni,Pb,Sn,Zr,O双幻核的基态性质,所得到的理论结果与实验值符合的更好。继而采用这套耦合常数系统的计算了Ca,Ni,Pb,Sn,Zr同位素链核基态性质,并进行了详细的分析。The ground state properties of the Ca,Ni,Pb,Sn,Zr,O double unreal nuclear are calculated by applying the density dependent relativistic mean field.The rearrangement terms are considered in this paper.The theoretical results show that the density dependent relativistic mean field theory provides a good description of the binding energies per nucleon and charge radii.Considering the importance of small density coupling intensity,the paper reconstructs a group double unreal nuclear,and applying this group of coupling constants to calculate the ground state properties of Ca and others.double unreal nuclear.The theoretical results correspond with experimental values better.The paper systematically calculates the ground state properties of Ca,Ni,Pb,Sn,Zr isotopic chain and analyses the influence of small density coupling constants in detail.

关 键 词：密度依赖的相对论平均场理论 双幻核 耦合常数 

分 类 号：O571.2[理学—粒子物理与原子核物理]